/Engine/Plugins/Interchange/Runtime/Source/Import/Public/Material/InterchangeMaterialFactory.h
Sets the object's source at the specified index to the given SourceFileName
virtual bool SetSourceFilename ( const [UObject](API\Runtime\CoreUObject\UObject\UObject) * Object, const [FString](API\Runtime\Core\Containers\FString) & SourceFilename, int32 SourceIndex ) const